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The random variable X is normally distributed Also it is

The random variable X is normally distributed. Also, it is known that P(X>150) 5

a. Find the population mean µ if the population standard deviation σ = 15.

b. Find the population mean µ if the population standard deviation σ = 25.

c. Find the population standard deviation σ if the population mean µ = 136.

d. Find the population standard deviation if the population mean µ = 128.

a. Find the population mean µ if the population standard deviation σ = 15.

b. Find the population mean µ if the population standard deviation σ = 25.

c. Find the population standard deviation σ if the population mean µ = 136.

d. Find the population standard deviation if the population mean µ = 128.

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